2) Water flows at a flow rate Q = 1.5 kg/s in the horizontal duct of constant diameter shown in the diagram in Figure. Due to viscous friction, a pressure drop hf = 500 N/m2 of water occurs between sections A and B. If the pressure at point B is equal to 1.5 bar, determine: a) the pressure at point A; b) the friction force between points A and B. Data: p = 1000 kg/m3; D = 10 cm. = na Hro he A .A .8 D. 10 cm